CN103635706A

CN103635706A - Thrust roller bearing with races

Info

Publication number: CN103635706A
Application number: CN201280032175.XA
Authority: CN
Inventors: 武村浩道; 近藤丰
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2011-09-20
Filing date: 2012-08-28
Publication date: 2014-03-12
Also published as: EP2713067A4; US8827566B2; EP2713067A1; WO2013042512A1; JP2013079718A; KR20140014296A; US20140147071A1; KR101521377B1

Abstract

The invention achieves a thrust roller bearing structure with races that can increase the permissible level of eccentricity of a pair of members that rotate relative to each other as well as increase the amount of lubricating oil that is circulated therein, while securing the function of preventing the separation of a cage (3), a first thrust race (4a) and a second thrust race (5a). The external diameter of the external diameter side flange (8a) formed on the outer margin of a first thrust race (4a) is 60 mm - 120 mm, the internal diameter of the internal diameter side flange (11a) formed on the inner margin of an internal diameter side flange (5a) is 40 mm - 80 mm, and the internal space is 1 mm - 2 mm. Therefore, the external diameter side catch (9a) is formed intermittently in the circumferential direction on the leading edge of the external diameter side flange (8a).

Description

Thrust roller bearing with seat ring

Technical field

The present invention relates to the thrust roller bearing (comprising needle roller thrust bearing) with seat ring, it is the thrust load that supports the rotary support part in the various rotating machineries such as speed changer that impose on automobile, and is assembled in this rotary support part.

Background technique

Rotary support in the various rotating machineries such as speed changer of automobile is partly installed such thrust roller bearing that TOHKEMY 2005-164023 communique is recorded, one surface bearing imposes on the thrust load between the static part such as the rotary components such as running shaft and housing, and one side allows the rotation of this rotary component.In addition, in the situation that are the materials that are difficult to guarantee necessary hardness through the counterrotating a pair of parts of such thrust roller bearing, or be processed in the situation of necessary even surface difficulty and even trouble, use the thrust roller bearing with seat ring of a retainer and many rollers and two seat ring combinations.

Fig. 7 means in the past by an example of the known thrust roller bearing 1 with seat ring widely.This thrust roller bearing 1 with seat ring by by radiation direction arrange a plurality of rollers 2, the retainer 3 that keeps these rollers 2, at the axle direction of this retainer 3, from the first thrust seat ring 4, the second thrust seat ring 5 of these rollers 2 of sandwich, form.Retainer 3 becomes circle shape by integral manufacturing, in this retainer 3 in the circumferencial direction pocket hole 6 that uniformly-spaced and radially magnitude setting is identical with roller 2.

In addition, the first thrust seat ring 4 and the second thrust seat ring 5 are made by respectively Bearing Steel or case-hardened steel etc. being had to stamping-out processing and the bending that the horminess metal plate of enough hardness implements based on punching press.It is smooth and for the first thrust race portion 7 of circle shape, with the outside diameter flange 8 cylindraceous that axially state of one-sided warpage is set up of the outer periphery from the first thrust race portion 7 that the first thrust seat ring 4 that is commonly referred to as outer ring possesses.In addition, at the front-end edge of this outside diameter flange 8, be provided with the outside diameter engaging portion 9 of square warpage in radius vector direction.On the other hand, it is smooth and for the second thrust race portion 10 of circle shape, with the internal side diameter flange 11 cylindraceous that axially state of one-sided warpage is set up of the inner circumference edge from the second thrust race portion 10 that the second thrust seat ring 5 that is commonly referred to as inner ring possesses.In addition, at the front-end edge of this internal side diameter flange 11, be provided with the internal side diameter engaging portion 12 of warpage outside radius vector direction.

Make the internal diameter of outside diameter flange 8 larger than the external diameter of retainer 3, make the external diameter of internal side diameter flange 11 less than the internal diameter of retainer 3, at external diameter side flange 8 and internal side diameter flange 11 each other, can with respect to the first thrust seat ring 4, relative rotation freely configures retainer 3 with the second thrust seat ring 5.In addition, make the inscribe diameter of a circle of outside diameter engaging portion 9 slightly less than the external diameter of retainer 3, make the external diameter of a circle of internal side diameter engaging portion 12 slightly larger than the internal diameter of this retainer.And one side makes outside diameter flange 8 and internal side diameter flange 11 resiliently deformables, one side will keep retainer 3 and the first thrust seat ring 4 and second thrust seat ring 5 combinations of roller 2, after combination, make these parts relatively rotate freedom, and, can be optionally not separated.In addition, in illustrated example, consider the first thrust seat ring 4 to be assemblied in the parts of the iron class alloy system that hardness is high, the second thrust seat ring 5 is assemblied in the parts of the aluminium class alloy system that hardness is low.Thus, make the thickness size of the second thrust seat ring 5 larger than the thickness size of the first thrust seat ring 4.

The thrust roller bearing 1 with seat ring forming so as shown in Figure 8, to be embedded in the state in the holding part 14 being formed on housing 13, is equipped in the rotary support part that produces thrust load by the outside diameter flange 8 of outer periphery that is formed on the first thrust seat ring 4.In addition, make the end face butt of the second thrust seat ring 5 and the other side's parts 15.Under this state, these the other side's parts 15 rotations are freely supported on to housing 13.The thrust load being applied between these the other side's parts 15 and housing 13 is supported by the thrust-bearing 1 with seat ring.The thrust-bearing 1 with seat ring like this requires to make as far as possible to heavens the such function in (1)～(4) below and deposits.

(1) retainer 3 can be optionally not separated with the first thrust seat ring 4 and the second thrust seat ring 5.

This function be for by the thrust-bearing with seat ring 1 maquila from the manufacturing works of bearing to speed changer etc. carry, during before assembling to established part, prevent by these isolation of components, can not obtain with the original performance of the thrust-bearing 1 of seat ring, or the assembling operation of speed changer etc. becomes trouble and needs.

(2), when the running such as speed changer, at the first thrust seat ring 4 and the second thrust seat ring 5 each other, can guarantee at the flow (flow of lubrication) of lubricant oil that is provided with the inner space circulation of retainer 3 and roller 2.

This function is for when the running such as speed changer, guarantees to be formed on the oily film strength of the rotation surface of roller 2 separately and the rolling contact section of the first thrust race portion 7 and the second thrust race portion 10, and cooling these rolling contact section and needing effectively.

(3), even in the situation that the rotating center of the first thrust seat ring 4 and the second thrust seat ring 5 staggers slightly (these thrust seat rings carry out eccentric motion slightly), also ensure that retainer 3 is with respect to the relative rotation of the first thrust seat ring 4 and the second thrust seat ring 5.

Even if this function is for the foozle of the thrust-bearing 1 due to seat ring, speed changer etc., assembly error etc., make in situation that the rotating center of the first thrust seat ring 4 and the second thrust seat ring 5 staggers slightly, also guarantee with the function of the thrust-bearing 1 of seat ring and need.

(4) can be only can not be in assembling in the other direction with the thrust roller bearing 1(of seat ring to assemblings such as housings 13 in prescribed direction).

This function is in order to prevent that, because with the thrust roller bearing 1 of seat ring, making the stream of lubricant oil blocked in assembling in the other direction, the thrust roller bearing 1 at this with seat ring produces sintering equivalent damage and needs.

In structure in the situation that in the past, be difficult to make to heavens the function shown in (1)～(4) and deposit, seek to improve speed changer etc. be incorporated with the aspect of performance of the various mechanical devices of the thrust-bearing of seat ring unfavorable.Below, this point is described.

In order to take into account to heavens the function of (1) and (2), need to simultaneously increase the cooperation surplus of the peripheral portion of outside diameter engaging portion 9 and internal side diameter engaging portion 12 and retainer 3, one side expands the gap between outer interior two side faces that are present in outside diameter flange 8 and internal side diameter flange 11 and retainer 3.But, if consider the assembling performance of the first thrust seat ring 4 and the second thrust seat ring 5 and retainer 3, can not exceedingly increase this cooperation surplus.For example, by retainer 3 and the combination of the first thrust seat ring 4 in the situation that, as shown in Fig. 9 (A) → (B) → (C), one side makes outside diameter flange 8 radius vector direction foreign side resiliently deformables, and one side makes the periphery edge of retainer 3 cross outside diameter engaging portion 9.If the overhang δ that the inner peripheral surface from outside diameter flange 8 of outside diameter engaging portion 9 starts is excessive, be difficult to carry out this operation.

As outside diameter engaging portion 9, have by the front end edge of outside diameter flange 8 substantially in radius vector direction square bending forming and the so-called complete curling structure that obtains and by all Directional discontinuities be present in outside diameter flange 8 front end edge many places respectively in radius vector direction side be bent to form and the curling structure of so-called part that obtains.The in the situation that of complete curling structure, if not make overhang δ considerably little, or substitute the situation guarantee this overhang δ, and it is considerably little that the external diameter of retainer 3 is compared with the internal diameter of outside diameter flange 8, this retainer 3 can not be packed into the inner side of outside diameter flange 8.But, make the external diameter of retainer 3 compare with the internal diameter of outside diameter flange 8 too little situation guarantee the polarization on footpath direction (the footpath direction that suppress this retainer 3 wave) of retainer 3 with respect to the first thrust seat ring 4 aspect not preferred.Thus, in the situation that adopting complete curling structure, need to make overhang δ little.The internal diameter that is 60mm～120mm, internal side diameter flange at the external diameter that becomes the outside diameter flange of object of the present invention is in the roller bearing 1 with seat ring of 40mm～80mm left and right, in the situation that making outside diameter engaging portion 9 for complete curling structure, if make overhang δ surpass 0.4mm, become large, be difficult to retainer 3 to pack into the inner side of outside diameter flange 8.

On the other hand, if adopt the curling structure of part, can make the elastic deformation amount of the outside diameter flange 8 when retainer 3 is packed into the inner side of external diameter side flange 8 increase (scope that expands resiliently deformable).Therefore, even if increase the overhang δ of outside diameter engaging portion 9, and, reduce to a certain degree the poor of the external diameter of retainer 3 and the internal diameter of outside diameter flange 8, can this retainer 3 not packed into the inner side of outside diameter flange 8 particularly troublesomely yet.And, if as recorded in Fig. 3 of TOHKEMY 2008-39031 communique and Fig. 4, outside diameter engaging portion at the curling structure of circumferencial direction many places forming section of the front-end edge of external diameter side flange, and reduce the height dimension on axle direction in the adjacent outside diameter engaging portion of circumferencial direction part each other in this outside diameter flange, can be at the first thrust seat ring and the second thrust seat ring each other, expand the opening area of the outside diameter of the inner space that is provided with retainer and roller, guarantee flow of lubrication, can access the function of (1) and (2).

But, even if the structure of recording according to Fig. 3 of No. 2008-39031, TOHKEMY and Fig. 4 can not obtain the function of (3) and (4).For example, in order to obtain the function of (3), need to be that (be not excessive but moderately) allows to form the first thrust seat ring 4 of thrust roller bearing 1 and the structure of the second thrust seat ring 5 relative displacement in footpath direction each other with seat ring to a certain degree., the first thrust seat ring 4 and the second thrust seat ring 5 to be to be supported on respectively the state on counterrotating a pair of parts mutually, rotate together with these parts.Therefore,, if the rotating center of these parts staggers in footpath direction, the first thrust seat ring 4 and the second thrust seat ring 5 carry out whirling motion mutually.And if the radius (offset) of this whirling motion is large, as shown in figure 10, a part for retainer 3 is strongly clamped (" sandwiching " of producing retainer) between the inner peripheral surface of external diameter side flange 8 and the outer circumferential face of internal side diameter flange 11.Its result is, to the part of this retainer 3, applies large radial load, easily cracks, equivalent damage chaps at this retainer 3.In addition, this retainer 3 no longer rotates, can not carry out revolution and the rotation of roller 2, the second thrust seat ring face 20 phase mutual friction (sliding contact) of the first thrust seat ring face 17 of the rotation surface of these rollers 2 and the first thrust race portion 7 and the second thrust race portion 10, the great damages such as sintering, retainer 3 breakages of contacting part that produce the rotation surface of the first thrust seat ring face 17 and the second thrust seat ring face 20 and roller 2 at the thrust roller bearing 1 with seat ring.

In the situation that become the external diameter of the outside diameter flange of object of the present invention, be that the internal diameter of 60mm～120mm, internal side diameter flange is the thrust roller bearing 1 with seat ring of 40mm～80mm left and right, if adopt the outside diameter engaging portion of complete curling structure as outside diameter engaging portion 9, can make retainer 3 by the internal side diameter of this outside diameter engaging portion 9, as previously mentioned, the footpath direction overhang of this outside diameter engaging portion 9 need to be suppressed to 0.4mm left and right.Under this condition, internal void with the thrust roller bearing 1 of seat ring terminates in 0.6mm～1.6mm left and right, if stagger (radius of aforementioned whirling motion) of the footpath direction of the rotating center of these parts surpasses 0.5mm, the possibility that produces damage as described above raises.TOHKEMY 2008-39031 communique does not have to record for preventing the structure of such damage.

In addition, in the situation that the thrust-bearing with seat ring 1 is equipped between housing 13 and the other side's parts 15, if mistake assembly direction, because insufficient lubrication diminishes durability etc., can not make the enough performances of thrust-bearing 1 performance with seat ring., this thrust roller bearing 1 with seat ring also may be assemblied in housing 13 with the direction contrary with the normal state shown in Fig. 8 (with irregular state).But in the situation that being assembled into irregular state, the first thrust seat ring 4 stops up the gap between housing 13 and the other side's parts 15 16, hinders lubricant oil to the internal circulation of the roller bearing 1 with seat ring.

As for preventing such structure of putting upside down improperly assembling, Figure 11 of TOHKEMY 2004-28342 communique and Figure 12 have recorded the external diameter of the second thrust race portion that makes the second thrust seat ring than the large structure of external diameter of the outside diameter flange of the first thrust seat ring.According to such structure, because the second thrust seat ring can not be inserted in the holding part of housing, so, can prevent that the second thrust seat ring is assemblied in the holding part of housing mistakenly.That is, because can only assemble the first embedded thrust seat ring of original wish in this holding part, so, can prevent from putting upside down assembling.But, in the situation that such structure in the past, because the part of the close outer periphery in the second thrust race portion is compared the outstanding part of radius vector direction foreign side by the sizable Partial Blocking of outside diameter opening of the inner space of the thrust roller bearing with seat ring with the outer circumferential face of outside diameter flange, make flow of lubrication few, so, diminish the function of (2).

From explanation above, be appreciated that actual conditions are to be difficult to make to heavens the function shown in (1)～(4) and deposit in the past constructing.In addition, above-mentioned formerly technical paper by reference to and be included into this specification.

Technical paper formerly

Patent documentation

Patent documentation 1: TOHKEMY 2005-164023 communique

Patent documentation 2: TOHKEMY 2008-39031 communique

Patent documentation 3: TOHKEMY 2004-28342 communique

Summary of the invention

The problem that invention will solve

The present invention is in view of situation as described above, the object that is configured to the thrust roller bearing with seat ring that is achieved as follows: the separation function that prevents of guaranteeing retainer and a pair of thrust seat ring by one side, one side increase counterrotating a pair of parts with respect to eccentric allowance, and increase to the amount of the lubricant oil of internal circulation, thereby it is good to realize treatability, even and if under harsh service condition, also can guarantee stable operating condition.

For solving the means of problem

Thrust roller bearing with seat ring of the present invention possesses retainer, many rollers, the first thrust seat ring and the second thrust seat rings.Retainer is wherein circle shape, and each long pocket hole of comfortable radiation direction is arranged on to circumferencial direction many places.In addition, aforementioned roller is rotated in each that is freely configured in aforementioned pocket hole.Have, the first thrust seat ring is the rotate free and non-discretely parts of combination relative to aforementioned retainer with the second thrust seat ring, all horminess metal plate bending forming is formed again.

The first thrust seat ring possess smooth and for the first thrust race portion of circle shape, with the outside diameter flange cylindraceous that axially state of one-sided warpage is set up of the outer periphery from the first thrust race portion, the part of the front-end edge of this outside diameter flange with the front-end edge radius vector direction from this outside diameter flange in side-prominent state be arranged on the outside diameter engaging portion of circumferencial direction many places.In addition, make the height dimension on axle direction of aforementioned outside diameter flange less than the part that is provided with this outside diameter engaging portion in the part that this outside diameter engaging portion is not set.Have, the external diameter of aforementioned outside diameter flange is 60mm～120mm again.

On the other hand, the second thrust seat ring possesses smooth and for the second thrust race portion of circle shape, with the internal side diameter flange cylindraceous that axially state of one-sided warpage is set up of the inner circumference edge from the second thrust race portion, in the part of the front-end edge of this internal side diameter flange, with outstanding state outside the front-end edge radius vector direction from this internal side diameter flange, is arranged on the internal side diameter engaging portion of circumferencial direction many places.In addition, the internal diameter of aforementioned internal side diameter flange is 40mm～80mm.

Especially in the thrust roller bearing with seat ring of the present invention, internal void is 1mm～2mm.This internal void is the first thrust seat ring and the second thrust seat ring without the resiliently deformable of parts separately and can be in the size of footpath direction relative displacement, be under the state aforementioned outside diameter flange and internal side diameter flange and aforementioned retainer being configured with one heart in hypothesis, be present in respectively the footpath direction size sum of the annular gap between inside and outside two side faces of the inner peripheral surface of outside diameter flange and the outer circumferential face of internal side diameter flange and aforementioned retainer.

Preferably aforementioned retainer is made by making integral body become hollow annular the first retainer element and the second retainer elements combination.In addition, form inside and outside two peripheries from the first plat part of circle shape on axle direction to mutually identical the direction chimeric cylindrical part of the first internal side diameter of warpage and the chimeric cylindrical part of the first outside diameter and form the first retainer element that is configured in the first thrust race portion side in these retainer elements squarely.On the other hand, form inside and outside two peripheries from the second plat part of circle shape on axle direction to mutually identical direction and to the direction contrary with the chimeric cylindrical part of the first internal side diameter and the chimeric cylindrical part of the first outside diameter chimeric cylindrical part of the second internal side diameter of warpage and the chimeric cylindrical part of the second outside diameter and form the second retainer element that is configured in the second thrust race portion side squarely.And, by the chimeric cylindrical part of aforementioned the first internal side diameter is embedded in to the chimeric cylindrical part of aforementioned the second internal side diameter, and the chimeric cylindrical part of aforementioned the first outside diameter is embedded in to the chimeric cylindrical part of aforementioned the second outside diameter outward, thereby the first retainer element and the second retainer element are combined mutually.Have again, make the diameter of the chimeric cylindrical part of the second outside diameter larger than base half portion near the second plat part at the first half of the side away from the second plat part, only at this first half, the chimeric cylindrical part of the first outside diameter is embedded in to the chimeric cylindrical part of the second outside diameter outward.

In addition, preferably the second thrust seat ring is made to the seat ring of at least one tab that possesses the second thrust race portion (thrust seat ring main body) of circle shape and be set up with the outstanding state of a part of radius vector direction foreign side of the outer periphery from the second thrust race portion.And, make the external diameter of the second thrust race portion less than the internal diameter of aforementioned outside diameter flange, make to comprise that the external diameter of a circle of the second thrust seat ring of aforementioned tab is larger than the external diameter of this outside diameter flange.

In this case, more preferably make the thickness size of aforementioned tab less than the thickness size of the second thrust race portion.And, make stepped part be present in the boundary portion of in this tab and front-end edge aforementioned outside diameter flange one side in opposite directions and the seat ring face that aforementioned roller is rolled contact in the second thrust race portion.

In this case, also preferably aforementioned tab is equally spaced arranged on to the many places of the outer periphery of the second thrust race portion in a circumferential direction.

Invention effect

According to the thrust roller bearing with seat ring of the present invention, the function that can make above-mentioned (1)～(4) to heavens and deposit.Specifically, one side is guaranteed the separation function that prevents of retainer and a pair of thrust seat ring, one side increases counterrotating a pair of parts with respect to eccentric allowance, and increase to the amount of the lubricant oil of internal circulation, accordingly, make treatability good, and, even under harsh service condition, also can guarantee stable operating condition.

Wherein the separation function that prevents of (1) can be by utilizing the engaging of the outer periphery of outside diameter engaging portion and retainer, make this retainer and the overstepping one's bounds liftoff combination of the first thrust seat ring, utilize the engaging of the inner circumference edge of internal side diameter engaging portion and this retainer, this retainer and the overstepping one's bounds liftoff combination of the second thrust seat ring are sought.

Like this, for by these thrust seat rings and the non-combination discretely of aforementioned retainer, be separately positioned on the outside diameter engaging portion of front-end edge of outside diameter flange and internal side diameter flange and the circumferencial direction many places that internal side diameter engaging portion is all formed on the front-end edge of flange separately discontinuously.Therefore, even if increase the overhang in footpath direction of aforementioned outside diameter engaging portion and internal side diameter engaging portion, also can be by the first thrust seat ring and the second thrust seat ring and the combination of aforementioned retainer.And, even with the overhang in the direction of footpath that can increase aforementioned outside diameter engaging portion and internal side diameter engaging portion correspondingly, increase to a certain degree the poor of the difference of the internal diameter of aforementioned outside diameter flange and the external diameter of aforementioned retainer and the external diameter of aforementioned internal side diameter flange and the internal diameter of aforementioned retainer, also can positively bring into play the separation function that prevents of this retainer and the first thrust seat ring and the second thrust seat ring.Its result is, as the internal void of the thrust roller bearing with seat ring, can adopt the so larger value of 1mm～2mm.

By adopting like this large value as this internal void, even in the situation that the first thrust seat ring and the second thrust seat ring have carried out whirling motion slightly, also can ensure that aforementioned retainer is with respect to the relative rotation of these thrust seat rings., because aforementioned internal void is large, so, even if the interval of the outer circumferential face of the inner peripheral surface of aforementioned outside diameter flange and aforementioned internal side diameter flange narrows down in a part for circumferencial direction based on aforementioned whirling motion, also the interval of this part is remained on to the large value of footpath direction width than aforementioned retainer.Therefore the situation that, a part for the circumferencial direction of this retainer is strongly clamped between the inner peripheral surface of aforementioned outside diameter flange and the outer circumferential face of aforementioned internal side diameter flange disappears.Its result is even that, in the situation that the rotating center of the first thrust seat ring and the second thrust seat ring staggers slightly, the aforementioned retainer that also can be protected is with respect to the relative function of rotating such (3) of these thrust seat rings.

In addition, as aforementioned internal void and make the height dimension on axle direction of the part that aforementioned outside diameter engaging portion is not set in aforementioned outside diameter flange little, can guarantee to the amount of the lubricant oil of aforementioned inner space circulation by taking compared with large value., by the height dimension of aforementioned outside diameter flange is diminished in a part, can make lubricant oil easily along footpath direction by this outside diameter flange.In addition, by making aforementioned internal void become large, can make lubricant oil easily between inside and outside two peripheries of aforementioned retainer and the inner peripheral surface of aforementioned outside diameter flange and the outer circumferential face of aforementioned internal side diameter flange, pass through.Its result is, can obtain to heavens guaranteeing in the running the function with the flow of lubrication of the thrust roller bearing of seat ring such (2).

In addition, by the chimeric cylindrical part of the first outside diameter of outer periphery that is formed on the first retainer element that forms aforementioned retainer only in the situation that the first half of the chimeric cylindrical part of this second outside diameter is embedded in the chimeric cylindrical part of the second outside diameter of the outer periphery that are formed on the second retainer element outward, can easily seek to take into account the phase mutual friction of guaranteeing the outer periphery of aforementioned retainer and the cooperation surplus of aforementioned outside diameter engaging portion and preventing outer periphery and the aforementioned outside diameter engaging portion of these retainers.

Have again, by the outer periphery forming the second thrust race portion of the second thrust seat ring, tab is set, can access and positively prevent the thrust roller bearing with seat ring in the other direction, to rotary supporting part, to divide mistakenly the function of assembling such (4).Because the circumferencial direction width of aforementioned tab is limited, so this tab hinders to the mobile situation of the lubricant oil of aforementioned inner space circulation few, even if possess the upside-down mounting of preventing function, also substantially can not diminish the function of guaranteeing flow of lubrication such (2).Especially, if the thickness size of aforementioned tab is diminished, fully expand the gap between the one side of this tab and the front-end edge of aforementioned outside diameter flange, can further reduce the mobile degree that this tab hinders lubricant oil.

Accompanying drawing explanation

Fig. 1 means the partial sectional view of the 1st example of embodiments of the present invention.

Fig. 2 in Fig. 2 (A) and the figure of 2 examples that (B) means the shape of the first thrust seat ring, (a) in figure is separately the figure seeing from the below of Fig. 1, is (b) figure seeing from footpath direction.

Fig. 3 in Fig. 3 (A) and (B) mean the figure that the top from Fig. 1 of 2 examples of the shape of the second thrust seat ring is seen.

Fig. 4 means the partial sectional view of the 2nd example of embodiments of the present invention.

Fig. 5 means about the sectional view of status of implementation making the test of the eccentric and durability turn round in the situation that of the first thrust seat ring and the second thrust seat ring.

Fig. 6 means the sectional view of status of implementation of test of the discharge value of relevant lubricant oil.

Fig. 7 means the partial sectional view of 1 example of the in the past known thrust-bearing with seat ring.

Fig. 8 means the partial sectional view of 1 example of the assembling condition of the thrust-bearing with seat ring shown in Fig. 7.

Fig. 9 means the partial sectional view for the operation in order the first thrust seat ring and the retainer that has kept roller being combined of the thrust-bearing with seat ring shown in Fig. 7.

Figure 10 means for the thrust-bearing with seat ring shown in Fig. 7, and retainer is according to the eccentric motion of the first thrust seat ring and the second thrust seat ring, the sectional view of the state between outside diameter flange and internal side diameter flange of being nipped.

Embodiment

[the 1st example of mode of execution]

Fig. 1～Fig. 3 means the 1st example of embodiments of the present invention.The thrust roller bearing 1a with seat ring of this example possesses retainer 3, many rollers 2, the first thrust seat ring 4a, the second thrust seat ring 5a.With regard to the structure of retainer 3 wherein and roller 2, due to identical with the structure in the past shown in Fig. 7, therefore, the part being equal to is marked to identical symbol, the repetitive description thereof will be omitted.In addition, with regard to the first thrust seat ring 4a and the second thrust seat ring 5a, hard metal bending forming is formed, rotation relative to retainer 3 freely and non-combination discretely in this point, also with constructed in the past identical.

The first thrust seat ring 4a possesses the first thrust race portion 7a, outside diameter flange 8a, a plurality of (being 3 in the structure of Fig. 2 (A), is 6 in the structure of Fig. 2 (B)) outside diameter engaging portion 9a.The first thrust race portion 7a is smooth and be circle shape, using axle direction one side (lower surface of Fig. 1) as the first thrust seat ring face 17.In addition, outside diameter flange 8a is short cylinder shape, and the state with the outer periphery from the first thrust race portion 7a to the axle direction that has the first thrust seat ring face 17 one-sided (downside of Fig. 1) approximate right angle ground warpage is set up.

In addition, by circumferencial direction, equally spaced many places (are 3 places in the structure of Fig. 2 (A) to the part of outside diameter engaging portion 9a by the front-end edge at external diameter side flange 8a, in the structure of Fig. 2 (B), be 6 places) amount of square warpage less than 90 degree in the direction of footpath, thus with side-prominent state in the front-end edge radius vector direction from outside diameter flange 8a, be set up.The inscribe diameter of a circle of outside diameter engaging portion 9a is only than the external diameter of retainer 3 slightly little (1mm～2mm left and right).

Have again, in the remaining part of the front-end edge of external diameter side flange 8a, in the adjacent outside diameter engaging portion 9a of circumferencial direction part each other, be formed with notch 18.And, according to the existence of these notchs 18, make that outside diameter flange 8a's is less than the part that is provided with outside diameter engaging portion 9a in the part that outside diameter engaging portion 9a is not set at axial height dimension.Shape that needn't special concern notch 18.Can be Fig. 2 (A) (b) shown in such trapezoid shaped, can be also that Fig. 2 (B) is such circular-arc shown in (b).The size of the first thrust seat ring 4a is the external diameter of outside diameter flange 8a, is 60mm～120mm.

On the other hand, the second thrust seat ring 5a possesses the second thrust race portion 10a, internal side diameter flange 11a, a plurality of (in illustrated example being 4) internal side diameter engaging portion 12a, a plurality of (being 3 in the structure of Fig. 3 (A), is 2 in the structure of Fig. 3 (B)) tab 19.The second thrust race portion 10a is smooth and be circle shape, using axle direction one side (upper surface of Fig. 1) as the second thrust seat ring face 20.In addition, internal side diameter flange 11a is short cylinder shape, and the state with the inner circumference edge from the second thrust race portion 10a to the axle direction that has the second thrust seat ring face 20 one-sided (upside of Fig. 1) approximate right angle ground warpage is set up.

In addition, the part that internal side diameter engaging portion 12a be take at the front-end edge of internal side diameter flange 11a towards footpath direction foreign side, is set up circumferencial direction many places (in illustrated example, being 4 places) from outstanding state outside the front-end edge radius vector direction of this internal side diameter flange 11a.In the case of this example, internal side diameter engaging portion 12a forms towards footpath direction outside curve the shape of seeing from axle direction by the front-end edge of internal side diameter flange 11a becomes roughly V font and forms.In addition, the shape of internal side diameter engaging portion 12a like this etc., the engaging portion of recording with Fig. 8 of TOHKEMY 2004-28342 communique～Figure 10 is identical, is in the past just by the shape of well-known, therefore, omits detailed explanation.With regard to the front-end edge of internal side diameter flange 11a, in the adjacent internal side diameter engaging portion 12a of circumferencial direction part each other, form notch 21, make that internal side diameter flange 11a's is less than the part that is provided with internal side diameter engaging portion 12a in the part that internal side diameter engaging portion 12a is not set at axial height dimension.

Have again, tab 19 be take and is formed on circumferencial direction in the outer periphery of the second thrust race portion 10a uniformly-spaced many places (being 2 places in the structure of Fig. 3 (A)) from the outstanding state of outer periphery radius vector direction foreign side of the second thrust race portion 10a in the structure of 3, Fig. 3 (B).Shape that needn't special concern tab 19.Can be such semicircle shown in Fig. 3 (A), or such rectangle shown in Fig. 3 (B).The thickness size t of tab 19 is than the thickness size T of the second thrust race portion 10a little (t<T).But in a side (downside of Fig. 1) contrary with the second thrust seat ring face 20, the second thrust race portion 10a and tab 19 are present on same plane.Therefore,, in a side of the second thrust seat ring face 20, in the one side (upper surface of Fig. 1) of these tabs 19 and the boundary portion of the second thrust seat ring face 20, exist and there is height dimension h(=T-t) stepped part 22.The size with the second thrust seat ring 5a of such shape is the internal diameter of internal side diameter flange, is 40mm～80mm left and right.In addition, the external diameter of the second thrust race portion 10a is larger than the external diameter of a circle of roller 2, less than the internal diameter of outside diameter flange 8a.In addition, the external diameter of a circle of tab 19 is larger than the external diameter of outside diameter flange 8a.

Have, the thrust roller bearing 1a with seat ring of this example is by suitably limiting the external diameter of retainer 3 and internal diameter, the internal diameter of outside diameter flange 8a, the external diameter of internal side diameter flange 11a again, and the size that makes internal void is 1mm～2mm.This internal void is that the first thrust seat ring 4a and the second thrust seat ring 5a can be in the sizes of footpath direction relative displacement with the resiliently deformable of the parts separately of the thrust roller bearing 1a of seat ring without formation.If these thrust seat rings are eccentric, as shown in the top of Figure 10, at the side face of external diameter side flange 8a and internal side diameter flange 11a, clamp each other a part for the circumferencial direction of retainer 3, in footpath opposite direction side, as shown in the bottom of Figure 10, become inside and outside two side faces and internal side diameter flange 11(11a at this retainer 3) outer circumferential face and outside diameter flange 8(8a) inner peripheral surface between press from both sides respectively gapped state.If make the footpath direction size in these gaps be respectively C1, C2, internal void becomes (C1+C2)/2.In other words, under state outside diameter flange 8a and internal side diameter flange 11a and retainer 3 being configured with one heart in hypothesis, become and between the inner peripheral surface of outside diameter flange 8a therein and the outer circumferential face of retainer 3, accompany footpath direction and be of a size of c2(=C2/2) annular gap, between the outer circumferential face of internal side diameter flange 11a and the inner peripheral surface of retainer 3, accompany c1(=C1/2) the state of annular gap.The value of internal void represents by the footpath direction size sum (c1+c2) of these annular gaps.

Because the thrust roller bearing 1a with seat ring of this example forms as described above, so, can simultaneously guarantee the separation function that prevents of retainer 3 and the first thrust seat ring 4a and the second thrust seat ring 5a, one side increase under the state that has supported these thrust seat rings counterrotating a pair of parts with respect to eccentric allowance, and make to the amount of the lubricant oil of internal circulation many.Its result is, can realize treatability good, even and under harsh service condition, also can guarantee the thrust roller bearing 1a with seat ring of stable operating condition.

First, one side allows above-mentioned parts (retainer 3, the first thrust seat ring 4a, the second thrust seat ring 5a) relative rotation each other, one side prevents that separated function can be by utilizing the engaging of the outer periphery of outside diameter engaging portion 9a and retainer 3, by this retainer 3 and the non-combination discretely of the first thrust seat ring 4a, utilize the engaging of the inner circumference edge of internal side diameter engaging portion 12a and retainer 3, this retainer 3 and the non-combination discretely of the second thrust seat ring 5a are sought to realize.In the situation that the thrust roller bearing 1a with seat ring of this example, outside diameter engaging portion 9a and internal side diameter engaging portion 12a are formed on the circumferencial direction many places of the front-end edge of outside diameter flange 8a and internal side diameter flange 11a respectively discontinuously.Therefore, even if increase to a certain degree the overhang in footpath direction of outside diameter engaging portion 9a and internal side diameter engaging portion 12a, also can be by the first thrust seat ring 4a and the second thrust seat ring 5a and retainer 3 combinations.

, the circumferencial direction many gaps of front-end edge separately to be provided with the outside diameter flange 8a of outside diameter engaging portion 9a and internal side diameter engaging portion 12a and the flexural rigidity of internal side diameter flange 11a lower than the flange that spreads all over the all-round complete curling structure that is provided with engaging portion, easily make the periphery edge of retainer 3 or inner circumference edge portion pass through.Thus, can increase outside diameter engaging portion 9a and internal side diameter engaging portion 12a in the overhang of footpath direction.And, even if correspondingly make the difference of the internal diameter of outside diameter flange 8a and the external diameter of retainer 3 and the difference of the external diameter of internal side diameter flange 11a and the internal diameter of retainer 3 increase with the overhang that can increase these engaging portions, also can positively bring into play the separation function that prevents of this retainer 3 and the first thrust seat ring 4a and the second thrust seat ring 5a.Its result is, as the internal void of the thrust roller bearing 1a with seat ring, can adopt the so larger value of 1mm～2mm.

And, the thrust roller bearing 1a with seat ring of this example is by adopting large value (1mm～2mm) as internal void, even in the situation that the first thrust seat ring 4a and the second thrust seat ring 5a carry out whirling motion (eccentric motion) slightly, also can ensure that retainer 3 is with respect to the relative rotation of these thrust seat rings., because internal void is large, so, even if move according to whirling in the interval of the outer circumferential face of the inner peripheral surface of outside diameter flange 8a and internal side diameter flange 11a, as shown in the top of Figure 10, a part at circumferencial direction narrows down, and also the interval of this part is remained to the large value of footpath direction width than retainer 3.Therefore the situation that, a part for the circumferencial direction of this retainer 3 is strongly clamped between the inner peripheral surface of external diameter side flange 8a and the outer circumferential face of internal side diameter flange 11a disappears.Its result is, even in the situation that the rotating center of the first thrust seat ring 4a and the second thrust seat ring 5a staggers slightly, also can ensure that retainer 3 is with respect to the relative rotation of these thrust seat rings., in the situation that the thrust roller bearing 1a with seat ring of this example, because can increase internal void, so, even if surpassing staggering of thrust seat ring rotating center each other under the such harsh service condition of 0.6mm, also can prevent the generation of sintering equivalent damage of contacting part of rotation surface of breakage, thrust seat ring face and the roller of the retainer in the past constructing.

In addition, by take larger value (1mm～2mm) and the part that outside diameter engaging portion 9a and internal side diameter engaging portion 12a are not set in external diameter side flange 8a and internal side diameter flange 11a to form notch 18,21 as internal void, make the little at axial height dimension of this part, can guarantee to the amount of the logical lubricant oil of inner spatial flow., by the height dimension of outside diameter flange 8a and internal side diameter flange 11a is diminished in a part, the area that is present in the opening portion of the inner space between these flanges and the peripheral portion of retainer 3 can be compared with the structure in the past shown in Fig. 7 and is expanded 2 times～10 times left and right to.And, can make lubricant oil level and smooth from the discharge of this internal void to inflow, lubricant oil in inner space, make lubricant oil easily in footpath direction is passed through this inner space.In addition, by increasing internal void, the lubricant oil easily annular gap between inside and outside two peripheries of retainer 3 and the outer circumferential face of the inner peripheral surface of outside diameter flange 8a and internal side diameter flange 11a passes through.Its result is, can guarantee fully in the running the flow of lubrication with the thrust roller bearing 1a of seat ring, compare with the structure in the past shown in Fig. 7, can make the flow of this lubricant oil increase to more than 20%, for example 40% left and right, correspondingly seeks to improve reliability and the durability with the thrust roller bearing 1a of seat ring with this part.

Have again, in the situation that the thrust roller bearing 1a with seat ring of this example arranges tab 19 in the outer periphery that form the second thrust race portion 10a of the second thrust seat ring 5a.The external diameter of a circle of these tabs 19 is larger than the external diameter of outside diameter flange 8a.Therefore, the first thrust seat ring 4a that is provided with outside diameter flange 8a can be embedded in the holding part 14 of the housing 13 shown in Fig. 8, can not be embedded but be provided with the second thrust seat ring 5a of tab 19.Thus, can positively prevent from the thrust roller bearing 1a with seat ring with respect to the housing 13 that forms rotary support part, assembling mistakenly in the other direction.

In addition, because the circumferencial direction width of tab 19 is limited, so these tabs 19 hinder few to the mobile situation of the logical lubricant oil of inner spatial flow.Therefore, even if possess upside-down mounting, prevent function, also can fully guarantee flow of lubrication.And, in the situation that the thrust roller bearing 1a with seat ring of this example, in these tabs 19 cave in front-end edge outside diameter flange 8a face side in opposite directions by making, thereby the thickness size t of tab 19 is diminished.Thus, can fully expand the gap between the one side of tab 19 and the front-end edge of outside diameter flange 8a, further reduce the mobile degree that these tabs 19 hinder lubricant oil.

[the 2nd example of mode of execution]

Fig. 4 means the 2nd example of embodiments of the present invention.In the case of this example, by the structure of research retainer 3a, can easily seek to take into account the periphery edge of guaranteeing the outer periphery of this retainer 3a and being arranged on the first thrust seat ring 4a a plurality of outside diameter engaging portion 9a cooperation surplus and prevent the outer periphery of these retainers 3a and the phase mutual friction of outside diameter engaging portion 9a.

The basic structure of retainer 3a itself is identical with the 1st example of mode of execution, by by the first retainer element 25 and the second retainer element 26 combinations, integral body is made to hollow annular.The first retainer element 25 of the first thrust race portion 7a side that is configured in the first thrust seat ring 4a in these retainer elements possesses the first plat part 27, the chimeric cylindrical part 28 of the first internal side diameter, the chimeric cylindrical part 29 of the first outside diameter.The first plat part 27 is circle shape, at circumferencial direction, uniformly-spaced forms radially respectively the first through hole 30 at the long long rectangle of footpath direction in many places.In addition, the chimeric cylindrical part 28 of the first internal side diameter and the chimeric cylindrical part 29 of the first outside diameter from inside and outside two peripheries of the first plat part 27 on axle direction to mutually identical direction warpage and forming squarely.In addition, the second retainer element 26 that is configured in the second thrust race portion 10b side of the second thrust seat ring 5b possesses the second plat part 31, the chimeric cylindrical part 32 of the second internal side diameter, the chimeric cylindrical part 33 of the second outside diameter.The second plat part 31 is circle shape, at circumferencial direction, uniformly-spaced forms radially long rectangle and quantity second through hole 34 identical with the first through hole 30 that is respectively footpath direction length in many places.In addition, the chimeric cylindrical part 32 of the second internal side diameter and the chimeric cylindrical part 33 of the second outside diameter from inside and outside two peripheries of the second plat part 31 on axle direction to identical direction mutually, and at a side contrary with the chimeric cylindrical part 29 of the first outside diameter with the chimeric cylindrical part 28 of the first internal side diameter warpage and forming squarely.Have again, make the diameter of the chimeric cylindrical part 33 of the second outside diameter larger than base half 35 places near the second plat part 31 at first half 36 places of the side away from this second plat part 31, the chimeric cylindrical part 33 of the second outside diameter is made to band ladder barrel shape.

The first retainer element 25 and the second retainer element 26 are by utilizing interference fit to be embedded in the chimeric cylindrical part 32 of the second internal side diameter the chimeric cylindrical part 28 of the first internal side diameter, utilize interference fit to be embedded in the first half 36 of the chimeric cylindrical part 33 of the second outside diameter outward the chimeric cylindrical part 29 of the first outside diameter, and these retainer elements are combined mutually, make retainer 3a.Now, the chimeric cylindrical part 29 of the first outside diameter is only embedded in the chimeric cylindrical part 33 of the second outside diameter outside first half 36.Thus, make the height (axle direction size) of the chimeric cylindrical part 29 of the first outside diameter below the height of this first half 36.In addition, the combination operation of these retainer elements coincide making to be formed on first through hole 30 of the first plat part 27 of the first retainer element 25 and the phase place of the second through hole 34 that is formed on the second plat part 31 of the second retainer element 26, and at these through holes, has configured respectively each other under the state of roller 2 and carry out.The length of the first through hole 30 and the second through hole 34 (footpath direction size) is larger than the length of roller 2, and the width of the first through hole 30 and the second through hole 34 (Zhou Fangxiang size) is less than the external diameter of roller 2.Therefore,, if by the first retainer element 25 and the combination of the second retainer element 26, form retainer 3a, roller 2 is separately to have stoped the state coming off to be rotated freely to remain on the first through hole 30 and the second through hole 34 each other., the first through hole 30 and the second through hole 34 coincide, and forms pocket hole 6.

According to the structure of above-mentioned such this example forming, can seek to take into account the periphery edge of guaranteeing the outer periphery of retainer 3a and being arranged on the first thrust seat ring 4a a plurality of outside diameter engaging portion 9a cooperation surplus and prevent the outer periphery of these retainers 3a and the phase mutual friction of outside diameter engaging portion 9a., in the situation that the structure of this example, owing to making, the height as the chimeric cylindrical part 29 of the first outside diameter of the maximum outside diameter portion of retainer 3a is little, so, can make the chimeric cylindrical part 29 of the first outside diameter and outside diameter engaging portion 9a not overlapping in footpath direction.Thus, when the thrust roller bearing 1c running with seat ring, can prevent the outside diameter engaging portion 9a that is set up discontinuously at circumferencial direction and the outer periphery phase mutual friction of retainer 3a, can ensure the rotation smoothly of this retainer 3a, easily make in addition with the operating condition of the thrust roller bearing 1c of seat ring stable.

With regard to other the structure and effect of part of this example, except omitting tab 19(referring to Fig. 1 and Fig. 3) this point, roughly the same with the 1st example of mode of execution, the repetitive description thereof will be omitted.In addition, with regard to the structure of this example, also can tab 19 be set in the outer periphery that form the second thrust race portion 10b of the second thrust seat ring 5b.

At the retainer of implementing to use in situation of the present invention in the illustrated embodiment, adopt the structure that the pair of holders elements combination respectively sheet metal bending forming being obtained is become to hollow annular and form.As the sheet metal that forms these retainer elements, for example, the Carbon Steel Plate (for example SPCC material) that can to use thickness be 0.4mm left and right carries out nitriding treatment, and making surface hardness is the sheet metal of Hv400～Hv850.But, also can use a sheet metal is flexed into cross section crank shape, integral body is made to the retainer of circle shape, the retainer of synthetic resin (PA66, PA46, PPS etc.) system.

In the situation that using arbitrarily retainer, all preferably by making the axle direction thickness of retainer at below 80% of diameter of roller, guarantee the direction bi-side, axle side of this retainer and the thickness of the annulus between the first thrust seat ring face and the second thrust seat ring face, seek to guarantee flow of lubrication.But, if make the not enough roller of the axle direction thickness of retainer diameter 50%, the inner face in pocket hole separately and the engaging of the rotation surface of these rollers that are difficult to make to be formed on this retainer (are difficult to be limited by roller the axle direction position of this retainer, if want, impose restrictions on, the inner face in pocket hole and the strongly phase mutual friction of the rotation surface of these rollers separately), hinder the possibility of the rotation that these rollers are level and smooth to raise.Therefore, preferably the axle direction thickness of retainer is included in 50%～80% the scope of diameter of roller.

In addition, material as the first thrust seat ring, by use SK85 etc., carbon element amount (C%) is at carburized materials (C%=0.1 % by weight～0.5 % by weight of raw material) such as the integral quenching material of 0.5 % by weight～1.0 % by weight or SCM415, in can the scope that be 0.6mm～2.0mm at the thickness of the first thrust seat ring, carry out part stample fiber.In addition, the in the situation that of full stample fiber, if thickness surpasses 1.0mm,, in the punch process that can carry out with low cost, be difficult to carry out the processing of outside diameter engaging sheet.

With regard to the second thrust seat ring, the material that can use is identical with the first thrust seat ring.Its thickness can be in the scope of 0.6mm～5.0mm.

Embodiment

Referring to table 1, table 2, Fig. 5 and Fig. 6, to for confirming that the test that effect of the present invention is carried out describes.Wherein, table 1 and Fig. 5 represent for knowing with the size of the internal void of the thrust roller bearing of seat ring making the test (eccentric test) of the first thrust seat ring and the second thrust seat ring impact that durability eccentric and under the state that turns round causes mutually and for knowing with the size of the inner space of the thrust-bearing of seat ring the condition of two kinds of tests of test (load ON/OFF test) of the state of having loaded the state of thrust load and the not loaded impact that alternately durability under operating condition repeatedly causes and result etc.These the two kinds common conditions of test are as follows.

External diameter with the thrust roller bearing of seat ring: 85mm

Internal diameter with the thrust roller bearing of seat ring: 54mm

Axle direction thickness (bearing width) with the thrust roller bearing of seat ring: 5.4mm

Test mass (P/C): 0.4(Fa=12600N)

Rotational speed (the first thrust seat ring sideway swivel): 6000min ^-1

Lubricating condition: flood the oil bath to rotating center by ATF

Lubricating oil temperature: 120 ℃

In addition, in bias test, eccentric fixture 23 as shown in Figure 5 makes the central shaft of the first thrust seat ring and the second thrust seat ring 0.6mm that staggers.

Have again, in load ON/OFF test, through from as by test body with the different thrust-bearing 24 of the thrust roller bearing 1b of seat ring, to every 2 seconds of the thrust roller bearing 1b with seat ring (1 circulation 4 seconds), repeatedly apply test mass.The first thrust seat ring and the second thrust seat ring are mutually concentric.

The vibration that one side is partly produced at the thrust roller bearing 1b with seat ring by vibrometer metering, one side is tested, in this vibration, surpass predefined threshold value and become greatly in the situation that, with the thrust roller bearing 1b of seat ring, reach the life-span, this time the test of naming a person for a particular job end.Table 1 has recorded till the time of ending and expression underproof " * " mark.In addition, till through vibration in 60 hours do not become large in the situation that, at this time point, end test, the thrust roller bearing 1b with seat ring decomposed, visualization have or not retainer damage, have or not the surfacial spalling equivalent damage of thrust seat ring face, in the situation that there is any one damage, in table 1, record and represent underproof " * " mark, in the situation that any one damage does not all have, in table 1, record and represent qualified " zero " mark.

[table 1]

In table 1, embodiment 1～6 is including the size of internal void in the scope of 1mm～2mm, in the situation that be to turn round under the so large offset of 0.6mm, even if all arrive 60 hours mathematic(al) expectations, do not produce retainer breakage, surfacial spalling equivalent damage yet.This is that to make internal void be the effect that 1mm brings above.

In addition, in load ON/OFF test, under the state that has discharged thrust load (during load OFF), retainer falls because of deadweight, after this, load by the state of ON under, produce the thrust roller bearing rotation be accompanied by with seat ring, a part of the Zhou Fangxiang of retainer is clamped in sandwiching between the inner peripheral surface of outside diameter flange and the outer circumferential face of internal side diameter flange.But in this case, the wearing and tearing of retainer are slight, even if arrive 60 hours as mathematic(al) expectation, in the part arbitrarily of the thrust roller bearing with seat ring, not have generation to become especially the such damage of problem yet.This is by internal void being suppressed to the effect that 2mm brings below.

On the other hand, in the situation that the comparative example 1～7 that the size of internal void departs from from scope of the present invention (1mm～2mm), in a side or both sides of bias test and load ON/OFF test, for defective.That is, the little comparative example 1,2,4,6 and 7 in internal void is all producing sandwiching of retainer in test arbitrarily.And, also in a part, exist and test can be proceeded to the situation through 60 hours, if but the thrust roller bearing with seat ring is decomposed, investigate each part, also produced be full of cracks or surfacial spalling equivalent damage.

From table 1, represent the test of its result, confirmed by internal void is limited in to 1mm～2mm, can realize the thrust roller bearing with seat ring with excellent durability.

Then the impact, the difference in order to know with the structure of the thrust roller bearing of seat ring being caused the flow of lubrication of the thrust roller bearing with seat ring and the test carried out describe.Test conditions is as follows.

External diameter with the thrust-bearing of seat ring: 85mm

Internal diameter with the thrust-bearing of seat ring: 54mm

Axle direction thickness (bearing width) with the thrust-bearing of seat ring: 5.4mm

Test mass (P/C): 0.05(Fa=12600N)

Rotational speed (the second thrust seat ring sideway swivel): 500min ^-1, 3000min ^-1, 5000min ^-1this three phases

Lubricating condition: the pressure with 5kPa is supplied with ATF from internal side diameter

Lubricating oil temperature: 100 ℃

The thickness of the first thrust seat ring: 0.8mm

The thickness of the second thrust seat ring: 1.6mm

The result of the test of carrying out with such condition is illustrated in table 2.In addition, the structure of embodiment 1～6 and comparative example 1～7 in table 1 and table 2 corresponding (being same size) respectively.

[table 2]

The record of the table 2 of the result of the test of carrying out with condition as described above from expression can be known clearly, the thrust roller bearing with seat ring that belongs to the embodiment 1～6 of technical scope of the present invention is not all subject to the impact of rotational speed, compare with the thrust roller bearing with seat ring of the comparative example 1～7 departing from from technical scope of the present invention, the amount of the lubricant oil passing through in inner space can be guaranteed more than 2 times.

From represented the result of 3 kinds of tests of result separately at table 1 and table 2, can know clearly, according to the thrust roller bearing with seat ring that belongs to technical scope of the present invention, treatability can be realized good, even and if under harsh service condition, also can guarantee the structure of stable operating condition.

In addition, the structure of comparative example 1 possesses the outside diameter engaging portion of full curled,, internal void is 0.8mm, the amount of sandwiching is 0.2mm, although through the test that is through with in 60 hours, but confirm, in inner situation, on retainer, to have produced crackle.With regard to load ON/OFF test, after 60 hours, do not produce abnormal yet.But, with regard to flow of lubrication, be interpreted as because opening area is narrow, so amount is few, harsh if service condition becomes, be difficult to guarantee enough durability.

In addition, with regard to comparative example 2～5, in the front end edge of external diameter side flange, at circumferencial direction, form discontinuously a plurality of outside diameter engaging portions respectively, and the outside diameter engaging portion adjacent at circumferencial direction forms otch each other, and then making internal void is 0.8mm or 2.3mm, accordingly, in bias test, just comparative example 3 and 5 is qualified.But, the in the situation that of comparative example 3 and 5, because internal void is excessive, so in load ON/OFF test, the amount of falling of the retainer during due to OFF is many, so, the breakage that produces halfway retainer.In addition, with regard to comparative example 2 and 4, in bias test, according to the wearing and tearing of the periphery edge of retainer, this retainer is damaged.With regard to flow of lubrication, the in the situation that of comparative example 2～7, compare increase with comparative example 1, still, do not compare with embodiment 1～6 yet and reduce.In addition, in embodiment 1～6, with regard to make by upside-down mounting prevent use tab attenuation with regard to the embodiment 2,3,5 and 6 of (being provided with step), do not compare with there is no the embodiment 1 and 4 of special attenuation, also can make flow of lubrication more.

Have again, with regard to comparative example 6 and 7, Fig. 1 of TOHKEMY 2004-28342 communique and the common constructed by lamellae of in the past just extensively being implemented shown in Fig. 2, but as shown in Fig. 1 and Fig. 7, be difficult to, at the front-end edge of outside diameter flange that forms the first thrust seat ring of thin-walled, the outside diameter engaging portion that overhang is large is set, therefore, be also difficult to guarantee internal void., with regard to comparative example 6 and 7, internal void is respectively little of 0.6mm, 0.4mm, in bias test, the periphery edge of retainer produces wearing and tearing halfway, retainer fracture.In addition, in load ON/OFF test, the breakage that also produces halfway retainer.In addition, forming the comparatively front-end edge of the internal side diameter flange of the second thrust seat ring of heavy wall, even common constructed by lamellae is also easily guaranteed large overhang.Therefore,, with regard to the 1st example of the embodiments of the present invention shown in Fig. 1 and Fig. 3, the internal side diameter engaging portion 12a as being formed on the front-end edge of internal side diameter flange 11a, adopts common constructed by lamellae.In addition, with regard to flow of lubrication, the in the situation that of comparative example 6 and 7, also express the tendency identical with comparative example 1～5.

The possibility of utilizing in industry

Thrust roller bearing with seat ring of the present invention is not limited to the speed changer of automobile, also can utilize the rotary support part with the so various rotating machineries of subsidiary engine at motors such as farm machinery, building machinery, steel machinery, compressors.

Description of reference numerals

1,1a, 1b, 1c: with the thrust roller bearing of seat ring; 2: roller; 3,3a: retainer; 4,4a: the first thrust seat ring; 5,5a, 5b: the second thrust seat ring; 6: pocket hole; 7,7a: the first thrust race portion; 8,8a: outside diameter flange; 9,9a: outside diameter engaging portion; 10,10a, 10b: the second thrust race portion; 11,11a: internal side diameter flange; 12,12a: internal side diameter engaging portion; 13: housing; 14: holding part; 15: the other side's parts; 16: gap; 17: the first thrust seat ring faces; 18: notch; 19: tab; 20: the second thrust seat ring faces; 21: notch; 22: stepped part; 23: eccentric fixture; 24: thrust-bearing; 25: the first retainer elements; 26: the second retainer elements; 27: the first plat parts; 28: the first chimeric cylindrical part of internal side diameter; 29: the first chimeric cylindrical part of outside diameter; 30: the first through holes; 31: the second plat parts; 32: the second chimeric cylindrical part of internal side diameter; 33: the second chimeric cylindrical part of outside diameter; 34: the second through holes; 35: Ji Banbu; 36: first half.

Claims

1. with a thrust roller bearing for seat ring, the described thrust roller bearing with seat ring possesses:

The retainer of circle shape, the retainer of described circle shape is arranged on circumferencial direction many places by each in the long pocket hole of radiation direction;

Many rollers, described many rollers are rotated in each that is freely configured in aforementioned pocket hole;

The first thrust seat ring and the second thrust seat ring, described the first thrust seat ring and the second thrust seat ring be relative with aforementioned retainer rotates free and non-combination discretely,

The first thrust seat ring forms horminess metal plate bending forming, possess: smooth and for the first thrust race portion of circle shape, with the outside diameter flange cylindraceous that axially state of one-sided warpage is set up of the outer periphery from the first thrust race portion, the part of the front-end edge of this outside diameter flange with the front-end edge radius vector direction from this outside diameter flange in side-prominent state be arranged on the outside diameter engaging portion of circumferencial direction many places, the height dimension on axle direction of aforementioned outside diameter flange is less than the part that is provided with aforementioned outside diameter engaging portion in the part that aforementioned outside diameter engaging portion is not set, the external diameter of aforementioned outside diameter flange is 60mm～120mm,

The second thrust seat ring forms horminess metal plate bending forming, possess: smooth and for the second thrust race portion of circle shape, with the internal side diameter flange cylindraceous that axially state of one-sided warpage is set up of the inner circumference edge from the second thrust race portion, in the part of the front-end edge of this internal side diameter flange, with outstanding state outside the front-end edge radius vector direction from this internal side diameter flange, be arranged on the internal side diameter engaging portion of circumferencial direction many places, the internal diameter of aforementioned internal side diameter flange is 40mm～80mm

The described thrust roller bearing with seat ring is characterised in that,

In hypothesis, configured with one heart under the state of aforementioned outside diameter flange and internal side diameter flange and aforementioned retainer, the internal void of the footpath direction size sum of the annular gap between inside and outside two side faces of the inner peripheral surface of outside diameter flange wherein and the outer circumferential face of internal side diameter flange and aforementioned retainer as the thrust roller bearing with seat ring will be present in respectively, in this case, the scope of this internal void in 1mm～2mm.

2. the thrust roller bearing with seat ring as claimed in claim 1, is characterized in that,

Aforementioned retainer is by by the first retainer element and the second retainer elements combination and integral body is made to hollow annular,

The the first retainer element that is configured in the first thrust race portion side forms the chimeric cylindrical part of the first internal side diameter and the chimeric cylindrical part of the first outside diameter and forms, the chimeric cylindrical part of described the first internal side diameter and the chimeric cylindrical part of the first outside diameter are carried out squarely warpage to mutual identical direction from inside and outside two peripheries of the first plat part of circle shape on axle direction

The the second retainer element that is configured in the second thrust race portion side forms the chimeric cylindrical part of the second internal side diameter and the chimeric cylindrical part of the second outside diameter and forms, the chimeric cylindrical part of described the second internal side diameter and the chimeric cylindrical part of the second outside diameter from inside and outside two peripheries of the second plat part of circle shape on axle direction to mutually identical direction and carry out warpage squarely to the direction contrary with the chimeric cylindrical part of the first internal side diameter and the chimeric cylindrical part of the first outside diameter

By the chimeric cylindrical part of the first internal side diameter is embedded in to the chimeric cylindrical part of the second internal side diameter, and the chimeric cylindrical part of the first outside diameter is embedded in to the chimeric cylindrical part of the second outside diameter outward, thereby the first retainer element and the second retainer element are combined mutually, make the diameter of the chimeric cylindrical part of the second outside diameter larger than base half place near the second plat part at the first half place of the side away from this second plat part, only at this first half, the chimeric cylindrical part of the first outside diameter is embedded in to the chimeric cylindrical part of the second outside diameter outward.

3. the thrust roller bearing with seat ring as claimed in claim 1 or 2, it is characterized in that, the second thrust seat ring possesses the second thrust race portion of circle shape, at least 1 tab being set up with the outstanding state of a part of radius vector direction foreign side of the outer periphery from the second thrust race portion, the external diameter of the second thrust race portion is less than the internal diameter of aforementioned outside diameter flange, comprises that the external diameter of a circle of the second thrust seat ring of aforementioned tab is larger than the external diameter of this outside diameter flange.

4. the thrust roller bearing with seat ring as claimed in claim 3, it is characterized in that, the thickness size of aforementioned tab is less than the thickness size of the second thrust race portion, and the boundary portion of in aforementioned tab and front-end edge aforementioned outside diameter flange one side in opposite directions and the seat ring face that aforementioned roller is rolled contact in the second thrust race portion exists stepped part.

5. the thrust roller bearing with seat ring as claimed in claim 4, is characterized in that, aforementioned tab is equally spaced arranged on the many places of the outer periphery of the second thrust race portion in a circumferential direction.